Add total_horizontal_gradient function and tests #560
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Implements the computation of the total horizontal derivative (THDR) of a potential field grid. This function calculates the square root of the sum of squares of the horizontal derivatives in the easting and northing directions.
Includes tests for: - Agreement with a synthetic model - Rejection of 1D and 3D grids - Handling of grids containing NaN values Ensures correctness and robustness of the total_horizontal_gradient filter.
This was referenced May 11, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This pull request adds the
total_horizontal_gradientfunction toharmonica._transformations, which computes the amplitude of the horizontal gradient (THDR) of a potential field grid using the horizontal derivatives in the easting and northing directions.It also includes:
This function complements
total_gradient_amplitudeby providing a horizontal-only version frequently used in gravity and magnetic data interpretation.Relevant issues/PRs:
Closes #559